Sound-deadening casing for vacuum-cleaners.



J. W. SMITH.

SOUND DBADENING CASING FOR VACUUM CLEANERS.

APPLICATION FILED MAY 18, 1909.

1,030,933., Patented July2, 1912.

2 SHBETS-SHEET 1.

WIITNESSEIS A'ITURIIEYS ;r. w. SMITH. SOUND DEADENING CASING FOR VACUUM CLEANERS.

APPLICATION FILED MAY 13, 1909.

Patented July 2, 1912.

2 SHEETS-SHEET 2.

MTIORIIEYS mve m;

Mum/Wm t 3 .Sound-Deadening Cleaners, of which the following is a. speci- UNITED STATES rrrrnnT OFFICE. I

JOHN W. sMrrI or CHICAGO, ILLINOIS.

SO'UIll'IlJJDEAI'IIEIN'ITNG CASING FOR VACUUM-CLEANERS.

1 causes.

To all whom it may concern: 7

Be it known that I. JonN V. SMITH, a citizen of the United States, residing at Chicago, in the county of Cook, State. of Illinois. have invented a new and useful Casing for Vacuum- In the devices heretofore employed for vacuum cleaning apparatus wherein a pumping mechanism is operated by a suitable motor and the articles are cleaned by passing thereover or in proximity thereto a suction nozzle which is connected bymeans ot' a suitable hose with the pumping mech- 'anism, it has been deemed necessary to either'employ a large casing In order that 'a pumping mechanism having a long stroke could be employed or it has been deemed necessary to construct the pumping mechanism of such size that a motor of corresponding size must be employed, the size and weight of which is so great thatthe vacuum cleaning device is not readily transportable but must be supported on some kind of a truck. This condition has arisen owing to the fact that it has heretofore been found impracticable to employ a standard motor which runs at a high speed since the valves heretofore employed in devices of this character would not act rapidly enough. In order to overcome these defectsand produce a cleaning mechanism of maximum power and minimum weight, I have devised a novel construction of a pumping apparatus fo-r'portable vacuum cleaners wherein the pumping mechanism may be actuated at a' very high speed, the same being driven in practice between fifteen hundred and four thousand revolutions per minute, and when running at such a high speed it is essential in a portable device which is employed in houses to employ some means to reduce the noise caused by the pulsation of the air, the running of the motor and the exhaust of air from the pump casing, and inmy present construction I have designed a novel construction of a pump casing by the employment of which the vacuum cleaning device is practically noiseless at high speeds.

To the above ends my present invention consists of a novel construction of a pump casing for vacuum cleaners wherein means are provided for reducing to a minimum the noise caused by the operation of the device. It further consists of a novel construction Specification of Letters Iatcnt.

Application filed May 18, 1909. Serial No. 496,756.

Patented July 2,1912.

of a,pump casing comprising a plurality of shells having sound-deadening material therebetween.

It further consists of a novel construction of a pump casing wherein the sides of the same comprise a plurality of shells having sound-deadening material and an air space therebetween, the'bottom of said device being provided with a desired number of layers of sound-deadening material on which the motor or the contacts therefor are adapted to be supported,-said casing having a cover removably secured thereto and in air ti ht engagement therewith, and means also ing provided for supporting the pumping apparatus and the motor within the casing.

It further consists of novel "means for supporting the motor, novel means of mounting the lead terminals so that when the pump unit-is placed in the casing the motor carried thereby will be in suitable engagement with the lead terminals, and novel means of mounting the motor controlling mechanism.

It further consists of a novel manner of correlating and arranging a sound, deadening casing so that the exhaust port leading from the casing is provided with a muttler mechanism preferably located within the casing.

It further consists of a novel construction For the purpose of illustrating my vent-ion I have shown in the. accompanying drawings a preferred construction many thousands of which are now inuse, the same conforming to a co-pending application for pneumatic pumping apparatus filed by me on even date with the present application, the broad principle involved being the same as that shown in my application for portable. pneumatic pumping apparatus, filed May 29th, 1908, Serial No. 35,633 and patented May 11th, 1909, and this embodiment has been found in practice to give very satis factory and reliable results, but it is of course to be understood that the various instrumentalities of which'my invention consists can be variously arranged and organized and that my invention is not limited to the exactarrangement and organization of these instrumentalitics as herein set forth. F igure 1 represents a sectional elevation ofa pump casing for vacuum cleaners embodying myinvention. Fig. 2 represents a sectional elevation of a portion of Fig. 1 showing certain details as seen in Fig. 3. Fig. 3 represents a sectional elevation on an enlarged scale of a portion of my device showing more clearly the construction of the upper portion of the casing. Fig. 4 represent-s a sectional elevation on an enlarged scale of a portion of my device showing more clearly the construction of the bottom of the device. view showing more clearly certain details in the construction of the casing cover;

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings :'In the detailed description of the device shown I have deemed it unnecessary to describe in detail either the pump mechanism or'the filter mechanism since the same are described and broadly claimed in two co-pending applications to which reference may be had for a detailed description of the con 'struction and operation of such devices.

1 designates a base or bottom member to which the rollers 2 are secured in any suitable manner, said'rollers being preferably provided with ball bearings 3, the purpose of which is evident.

4. designates the outer shellor casing, the lower end of which is'deflected as indicated at 5 around the base 1 and the-upper end of the shell 4 is outwardly deflected. as indicated at 6, as best seen in Fig. 3. Y

7 designates an intermediate shell, the lower end of which is deflected outwardly as indicated at 8, the upper end of said shell being also deflected outwardly as indicated at 9. i

' 1O designates a shell intermediate the shell 7 and the inner shell 13.

l4 and 15 designate layers of sound-deadening material such as for example felt, and

16 designates an air space. The lower end of the inner shell 13 is inwardly deflected at 17 while its upper end is inwardly deflected to form an annular groove 18, it being noted that the inwardly deflected portion engages the shell 10 and the upper portion of the inner shell 13 is inwardly deflected as indicated at 19 in order that the same may engage with the inner wall of the shell 10.

20 designates a plate or locking member, .the outer periphery of, which is deflected under the extension 6 of the outershell 4 Fig. 5 represents a sectional shell 13, thereby locking the upper part of the casing members in assembled position.

21 designates a plate the outer periphery of which is upwardly deflected into engagement with the outer shell 4 and then deflected into engagement with the extension 8 of the shell 7 Above the plate 21 is placed a layer of sound-deadening material 22, then a plate 23, then a layer of sound-deadening material 24, and above the latter is placed a plate 25 on which, in the present instance, the lower end of the shells 7 and 12 are seated.

Above the plate 25 is placed a layer of sound-deadening material QGa'nd above the latter is placed a plate 27, the outer periphcry of which is deflected downwardly and laterally as indicated at 28 and then up- Wardly and inwardly as indicated at 29 into engagement with the extension 17 of the inner shell 13, thereby locking said inner shell firmly in position. It will thus be seen that the upper portions of the members constituting the casings are properly socured in assembled position 'by means of the member 20 while the lower portion of said members are properly secured in position by means of the members forming the resilient base of the casing.

I In. order to form an air tight connection a cured in position, it being noted that the outer shell 4 has secured thereto in any suitable manner a bracket 34 to which is movably connected the threaded member provided with a suitable lockingnut36, said member35 being adapted to enter the slotted extension 37 of the cover 30, whereby said cover-may be readily assembled with respect to the casing or disengaged therefrom. The

groove 18 in the inner shell 13 is for the reception of the resilient ring 38 to which the bag 39 of the filtering mechanism is se-- cured.

40 designates a pump unit which is adapted to be seated on the packing 41, the latter being supported in a groove in a support 44 which latter is integral with the inner shell 13 or secured thereto by means of suitable fastening'devices 45. The pump unit 40 includes a motor 46, the shaft of which is connected by means of rods 47 with the movable member of the pump as will be readily understood by reference to my copending application for pneumatic pumping apparatus to which I have herei-nbefore referred.

48and 49 designate contact members carried by the pump unit 430 which are seated on the spring contact members and M respectively, the two latter fiormi-ng the lead terminals and being supported on the posts 52 and 53; The posts-52 and 58 are carriedby a plate 54 supported on the resilient base of the pump caslng. The post 53 is connected by means of a' conductor 70' with a witch 55 and thence to the cable 56 to which latter the conductor 57 leads, the latter being connected to the binding post 52, it being noted that an insulating bushing 58- is n'ovid'ed through which the cable 56 passes.

he switch 55 is secured in any suitable manner toa. tube 59 which is inserted in the side of the casing, it being seen from Fig. 2 that the miter casing member 4 is deflected thcreover in order to secure the same in" assembled position.

60 designates a. mul ller of any unusual or conventional type the air exhausting from the pressure compartment 61 passing in the I ably tapered inlet port 63 through which the incomingairmay pass into the vacuum compartment 64 in which the filtering mechanism is located. The cover 30 in the present instancc is provided with the extensions 65 to which is suitably secured ahandlc 66, it being noted that the handle 66 is of such length that itis adapted-to be grasped by the hands of two persons standing on opposite sides oi the casing, if desired. The cover 30 is provided with means for observing the condition of the air entering the inlet port 63 and as best seen in Fig. 5, the

' cover 30 is provided with a plate 67 over whi-ch the air must pass, and above the plate 67 the cover has preferably removably secured thereto a holder 68. the top of which is provided with suitable tran parent material 69. i

The Inufl'ler 60 comprises a casing 71 which is preferably supported within the pressure reservoir 61 in such a manner as to completely inclose the inner end of the exhaust port 62. The casing 71 is provided with an inlet port 72 which communicates with a.

chamber 73, which latter communicates by means of a. port 74 with a chamber 75, having a port 76 which communicates with a chamber 77. This chamber 77 communicates by a port 78 with the chamber 79, it being seen that the casing 80 of the muffler-mechanism is located within the casing 71 in such a manner that the air passing from the port 7 8 will have an indirect path to the exhaust port 62. It will be seen that the ports 72, 74, 76 and 78 are arranged in staggered relation with respect to each other.

I have deemed it unnecessary to describe, in detail, the complete operation of the vacuum cleaning device, since it will be appar: cut that when the switch 55 is actuated, current may pass to the motor 46 and actuate the latter. The pumping mechanism will then be operated so that. dust laden air will be drawn in through port 63 passing over the plate 67 in such a manner that the condition of the incoming air may be observed through the transparent member 69, the air then passing into the vacuum reservoir 64, wherein is located the filtering mechanism whlch removes from the airthe impurities contained therein, the air then passingthrouglr the pumping mechanism into the pressure compartment 61 and thence through the muttler to the exhaust port 62 to the atmosphere.

It will of course be apparent that the differentparts of the casing and the sounddeadening material located therein may be from Fig. 2' that in my present construction,

I locate the switch which controls the motor so that the same is contained within the outer circumference of the shell so that there is no liability of thesame becoming accidentally operated or injured in any manner.-

It will be apparent that by forming the internal bore of the inlet and outlet ports tapered the same are adapted to be connected with a suitable hose by simply pushing the metallic connection thereof into the inlet or outlet thereby dispensin with the necessity of forming screw treads or other coupling devices.

It will now be apparent that I have devised a new and useful construction of a casing especially adapted for vacuum clean-' ment thereof, which corresponds to several thousands now in practical use, it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit and scope of the invention or sacrificing any of its advantages.

Having thus described my invention,

- what I claim new and desire to secure by Letters Patent, is

1. As a new article of manufacture, a casing for vacuum pumps comprising a plurality of members, sound-deadening material intermediate said members, there being also an air space intermediate the inner and outer of said members, said casing having a port therethrough and having a portion thereof inwardly deflected to form a chamber, said casing having an open end, a cover, and means for removably securing said cover in air tight engagement with said end.

2. In a casing for vacuum cleaners, a base, sound-deadening material thereon, an

inner and an Outer shell supported on the base, sound-deadening material between the shells, means for closing the upper ends of the shells, said innershell being deflected near one end to form a groove, a ring seated on said means, a Ushaped gasket, a cover engaging said gasket, fastening de-. vices movably carried by the casing and engaging said-cover, and a handle extending substantially'across said cover.

3. In a casing for vacuum cleaners, a base, sound-deadening material thereon, a plurality of shells carried by said base, sound-deadening material between said shells, said shells havin'g a port therethrough, an opening for reception of a conduetor and provided with an inwardly deflee-ted portion forming a switch receiving chamber, means for closing the upper ends of the shells, a cover, and means for securing the cover in air tight engagement'with said. means.

4. In a casing for vacuum cleaners, a base, sound-deadening material thereon, rollers carried by the base, a plurality of-shel Is mounted on the base, layers of sound-deadening material and an air space between the shells, means passing through said shells for forming a switch receiving chamber, said shells having an exhaust port and an opening, a conductor-in said opening and operatively connected with the switch, binding posts carried by the base and connected with the conductor, contact plates communicating with said posts, a cover, and means for securing the cover in assembled position.

5. In a casing for vacuum cleaners, a base, a plurality of shells thereon, sound-deadening material between the shells, said shells having. an exhaust port therethrough, a mufiiing device secured within the casing and surrounding the exhaust port, a sealing member at the outer ,end of the shells, a cover engaging said member, and means for removably securing the cover in assembled position.

8.- In a device of the character described, a cylindrical casing comprising a plurality 'of shells, layers of sound-deadening material between the shells, a base, sounddeadening material on the base, a ring, sealing means on opposite side of said ring and engaging the casing, a cover having an inlet ort and seated on said means, and means or removably securing the cover in place. 7. In a device of the class described, the combination of a base, a vertical wall-composed of a plurality of spaced shells, the

space between the inmost shell and that immediately surrounding it being vacant,-and a support for the machine on the vertical.

wall located av substantial distance fronrthe .ingextended inwardly and then curved outwardly toward the wall of the casing to form a groove for the reception of the edge of a filter bag.

' 10. In a device of the class described, the combination of a cylindrical casing having an open upper end, a groove in the interior wall thereof adjacent the open upper end, a cover for the casing, and a sheet-metal ring having packing material on opposite faces thereof interposed between the casing and cover and projecting inwardly toward the center of the casing and then curved outwardly toward the wall of the casing to provide a groove for the reception of the edge of a filter bag.

JOHN W. SMITH. lVitnesses:

' ED. RANTENBERG,

G. C. ARMSTRONG. 

